[glibc] Always use wordsize-64 version of s_rint.c.

[Stefan Liebler <stli@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=ab48bdd098a675dddb360faafc497a61c4bd4334

commit ab48bdd098a675dddb360faafc497a61c4bd4334
Author: Stefan Liebler <stli@linux.ibm.com>
Date:   Wed Dec 11 15:09:14 2019 +0100

    Always use wordsize-64 version of s_rint.c.
    
    This patch replaces s_rint.c in sysdeps/dbl-64 with the one in
    sysdeps/dbl-64/wordsize-64 and removes the latter one.
    The code is not changed except changes in code style.
    
    Also adjusted the include path in x86_64 file.
    
    Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>

Diff:
---
 sysdeps/ieee754/dbl-64/s_rint.c             | 32 ++++++++--------
 sysdeps/ieee754/dbl-64/wordsize-64/s_rint.c | 58 -----------------------------
 sysdeps/x86_64/fpu/multiarch/s_rint-c.c     |  2 +-
 3 files changed, 17 insertions(+), 75 deletions(-)

diff --git a/sysdeps/ieee754/dbl-64/s_rint.c b/sysdeps/ieee754/dbl-64/s_rint.c
index dd01a84..66c9196 100644
--- a/sysdeps/ieee754/dbl-64/s_rint.c
+++ b/sysdeps/ieee754/dbl-64/s_rint.c
@@ -1,4 +1,3 @@
-/* @(#)s_rint.c 5.1 93/09/24 */
 /*
  * ====================================================
  * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
@@ -26,38 +25,39 @@
 #include <libm-alias-double.h>
 
 static const double
-  TWO52[2] = {
-  4.50359962737049600000e+15, /* 0x43300000, 0x00000000 */
- -4.50359962737049600000e+15, /* 0xC3300000, 0x00000000 */
+TWO52[2] = {
+	    4.50359962737049600000e+15, /* 0x43300000, 0x00000000 */
+	    -4.50359962737049600000e+15, /* 0xC3300000, 0x00000000 */
 };
 
 double
 __rint (double x)
 {
-  int32_t i0, j0, sx;
-  double w, t;
-  GET_HIGH_WORD (i0, x);
-  sx = (i0 >> 31) & 1;
-  j0 = ((i0 >> 20) & 0x7ff) - 0x3ff;
+  int64_t i0, sx;
+  int32_t j0;
+  EXTRACT_WORDS64 (i0, x);
+  sx = (i0 >> 63) & 1;
+  j0 = ((i0 >> 52) & 0x7ff) - 0x3ff;
   if (j0 < 52)
     {
       if (j0 < 0)
 	{
-	  w = TWO52[sx] + x;
-	  t = w - TWO52[sx];
-	  GET_HIGH_WORD (i0, t);
-	  SET_HIGH_WORD (t, (i0 & 0x7fffffff) | (sx << 31));
+	  double w = TWO52[sx] + x;
+	  double t =  w - TWO52[sx];
+	  EXTRACT_WORDS64 (i0, t);
+	  INSERT_WORDS64 (t, (i0 & UINT64_C (0x7fffffffffffffff))
+			  | (sx << 63));
 	  return t;
 	}
     }
   else
     {
       if (j0 == 0x400)
-	return x + x;                   /* inf or NaN */
+	return x + x;			/* inf or NaN  */
       else
-	return x;                       /* x is integral */
+	return x;			/* x is integral  */
     }
-  w = TWO52[sx] + x;
+  double w = TWO52[sx] + x;
   return w - TWO52[sx];
 }
 #ifndef __rint
diff --git a/sysdeps/ieee754/dbl-64/wordsize-64/s_rint.c b/sysdeps/ieee754/dbl-64/wordsize-64/s_rint.c
deleted file mode 100644
index 378b73a..0000000
--- a/sysdeps/ieee754/dbl-64/wordsize-64/s_rint.c
+++ /dev/null
@@ -1,58 +0,0 @@
-/*
- * ====================================================
- * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
- *
- * Developed at SunPro, a Sun Microsystems, Inc. business.
- * Permission to use, copy, modify, and distribute this
- * software is freely granted, provided that this notice
- * is preserved.
- * ====================================================
- */
-
-/*
- * rint(x)
- * Return x rounded to integral value according to the prevailing
- * rounding mode.
- * Method:
- *	Using floating addition.
- * Exception:
- *	Inexact flag raised if x not equal to rint(x).
- */
-
-#define NO_MATH_REDIRECT
-#include <math.h>
-#include <math_private.h>
-#include <libm-alias-double.h>
-
-static const double
-TWO52[2]={
-  4.50359962737049600000e+15, /* 0x43300000, 0x00000000 */
- -4.50359962737049600000e+15, /* 0xC3300000, 0x00000000 */
-};
-
-double
-__rint(double x)
-{
-	int64_t i0,sx;
-	int32_t j0;
-	EXTRACT_WORDS64(i0,x);
-	sx = (i0>>63)&1;
-	j0 = ((i0>>52)&0x7ff)-0x3ff;
-	if(j0<52) {
-	    if(j0<0) {
-		double w = TWO52[sx]+x;
-		double t =  w-TWO52[sx];
-		EXTRACT_WORDS64(i0,t);
-		INSERT_WORDS64(t,(i0&UINT64_C(0x7fffffffffffffff))|(sx<<63));
-		return t;
-	    }
-	} else {
-	    if(j0==0x400) return x+x;	/* inf or NaN */
-	    else return x;		/* x is integral */
-	}
-	double w = TWO52[sx]+x;
-	return w-TWO52[sx];
-}
-#ifndef __rint
-libm_alias_double (__rint, rint)
-#endif
diff --git a/sysdeps/x86_64/fpu/multiarch/s_rint-c.c b/sysdeps/x86_64/fpu/multiarch/s_rint-c.c
index 162a630..b010150 100644
--- a/sysdeps/x86_64/fpu/multiarch/s_rint-c.c
+++ b/sysdeps/x86_64/fpu/multiarch/s_rint-c.c
@@ -1,3 +1,3 @@
 #undef __rint
 #define __rint __rint_c
-#include <sysdeps/ieee754/dbl-64/wordsize-64/s_rint.c>
+#include <sysdeps/ieee754/dbl-64/s_rint.c>